Resources
Here you can find many links to download free plugins and virtual instruments, as well as other resources for music production.
Here you can find a complete list of free and open source software used by sound engineers and audio producers, and anyone who has anything to do with the recording and reproduction of sound. Below, broken down by categories, are effects, virtual instruments, and other tools for music production.
EQ
Sonimus SonEq
http://sonimus.com/site/page/downloads/
Windows: VST
Mac: VST & AU
SPL Free Ranger
http://plugin-alliance.com/en/plugins/detail/spl_free_ranger.html
Windows: VST, RTAS, AAX
Mac: VST, AU, RTAS, AAX
Elysia Niveau Filter
http://plugin-alliance.com/en/plugins/detail/elysia_niveau_filter.html
Windows: VST, RTAS, AAX
Mac: VST, AU, RTAS, AAX
BX Cleansweep (Hi&Lo Pass Filter)
http://plugin-alliance.com/en/plugins/detail/bx_cleansweep_v2.html
Windows: VST, RTAS, AAX
Mac: VST, AU, RTAS, AAX
Variety of Sound Boot EQ mkII
http://varietyofsound.wordpress.com/vst-effects/
Windows: VST
DYNAMICS
AudioDamage Rough Rider
http://www.audiodamage.com/downloads/
Windows: VST 32 & 64 bit
Mac: VST 32 & 64 bit, AU 32 bit
TDS Feedback Compressor
http://www.tokyodawn.net/tdr-feedback-compressor/
Windows: VST 32 & 64 bit
Variety of Sound ThrillseekerLA
http://varietyofsound.wordpress.com/vst-effects/
Windows: VST
Flux Bittersweet 2 (Transient Designer)
http://www.fluxhome.com/products/freewares/bittersweet2
Windows: VST 32 & 64 bit, RTAS
Mac: VST & AU 32 bit
REVERBS
Voxengo Old Skool Verb
http://www.voxengo.com/product/oldskoolverb/
Windows: VST &RTAS
Mac: VST, RTAS & AU
Anwida Soft DX Reverb Light
http://www.anwida.com/product.asp?pid=7
Windows: VST
Mac: AU
Knufinke SIR 1 (Impulse Loader)
http://www.knufinke.de/sir/index.php
Windows: VST
Mac: VST & AU
Reverbarete LE (Impulse Loader)
http://www.liquidsonics.com/software.htm
Windows: VST
Mac: VST & AU
Vacuum Sound PoorPlate Reverb
http://www.vacuumsound.de/plugins.html
Windows: VST 32 & 64bit
Mac: AU 32 & 64 bit
DELAY
ValhallaFreqEcho
http://www.valhalladsp.com/valhallafreqecho
Windows:: VST & RTAS
MAC: VST, RTAS & AU
Togu Tal Dub
http://kunz.corrupt.ch/products/tal-dub
Windows: VST
Mac: VST & AU
Ephonic Tape Delay
http://www.e-phonic.com/plugins/tapedelay.php
Windows:: VST
MAC: VST & AU
GSI Watkat
http://www.genuinesoundware.com/?a=showproduct&b=36
Windows: VST
Mac: VST & AU
PPD Echobox
http://www.pluginboutique.com/products/278-PPD-Echobox
Windows: VST
Variety of Sound Nasty DLA mkII
http://varietyofsound.wordpress.com/downloads/
Windows: VST
AMP SIMULATORS
LePou Plugins
http://lepouplugins.blogspot.it/
Windows: VST
Mac: VST & AU
Studio Devil British Valve Custom
http://www.studiodevil.com/products/british_valve_custom/
Windows: VST & RTAS
Mac: VST, AU & RTAS
Ignite Amps
http://www.igniteamps.com/en/audio-plug-ins
Windows: VST 32 & 64 bit
Mac: VST & AU 32 & 64 bit
DISTORTION
Voxengo Tube Amp
http://www.voxengo.com/product/tubeamp/
Windows: VST 32 & 64 bit
MAC: VST 32bit & AU 32 bit
Variety of Sound Ferric TDS (Tape Dynamics Simulator)
http://varietyofsound.wordpress.com/vst-effects/
Windows: VST
ALTRI EFFETTI
Izotope Vinyl
http://izotope.com/products/audio/vinyl/#
Windows: VST, RTAS, DX,
Mac: VST & AU
Voxengo Stereo Touch (Stereo Widener)
http://www.voxengo.com/product/stereotouch/
Windows: VST 32 & 64 bit
MAC: VST 32bit & AU 32 bit
VIRTUAL INSTRUMENTS
U-HE Tyrell n°6
http://www.u-he.com/cms/tyrelln6
Windows: VST 32 & 64 bit
Mac: AU 32 bit
U-HE Zebralette
http://www.u-he.com/cms/zebralette
Windows: VST 32 & 64 bit
Mac: AU 32 bit
Synth 1
http://www.kvraudio.com/product/synth1-by-ichiro-toda
Windows: VST
Mac: VST & AU
Minimogue VA
http://home.no/gunnare/downloads.htm
Windows: 32 bit
VirtuaDrum
http://www.amvst.com/node/20
Windows: VST
UTILITIES
Voxengo Span (Analizzatore)
http://www.voxengo.com/product/span/
Windows: VST 32 & 64 bit
MAC: VST 32bit & AU 32 bit
bx Solo (Mid Side Tool)
http://plugin-alliance.com/en/plugins/detail/bx_solo.html
Windows: VST, RTAS, AAX
Mac: VST, AU, RTAS, AAX
Voxengo MSED (Mid Side Tools)
http://www.voxengo.com/product/msed/
Windows: VST 32 & 64 bit
MAC: VST 32bit & AU 32 bit
Voxengo Sound Delay
http://www.voxengo.com/product/sounddelay/
Windows: VST 32 & 64 bit
MAC: VST 32bit & AU 32 bit
Flux Stereo Tool
http://www.fluxhome.com/products/freewares/stereotool
Windows: VST 32 & 64 bit, RTAS
Mac: VST & AU 32 bit